G-8 为什么选E

captain_mas

8. A rainstorm increased the amount of water stored
in State J reservoirs from 124 billion gallons to
138 billion gallons. If the storm increased the amount
of water in the reservoirs to 82 percent of total
capacity, approximately how many billion gallons of
water were the reservoirs short of total capacity prior
to the storm?
(A) 9
(B) 14
(C) 25
(D) 30
(E) 44
为什么选E啊？

mandying

168-124

captain_mas

168是约等于巴？